Ovulation bleeding vs implantation bleeding

Hello, I’m unsure what this bleeding means. I never experienced ovulation bleeding before I must say first. My period isn’t due for another 2 weeks and my ovulation day has passed. I did have sex during my period and ovulation day. Since my ovulation day I’ve been lightly spotting when I wipe, now 3 days later it’s looking more like light bleeding and I saw a tiny stringy clog. Could this be ovulation bleeding, implantation bleeding or a chemical pregnancy?